EP3115203A1 - Processing work for rotational machining - Google Patents

Abstract

The invention relates to a machining unit for rotary machining and a label printing machine with such processing units. The processing unit (10) is used for rotary machining of a web-shaped or arcuate substrate (1000) and has at least two processing cylinders (11, 12) and a machine frame (9), wherein a first processing cylinder (11) movable in the machine frame (9) and a second Processing cylinder (12) is mounted stationary in the machine frame (9), wherein each machining cylinder (11, 12) supporting body (14, 15) are associated. According to the invention, the support bodies (14) of the second machining cylinder (12) are formed as spiral support bodies as rotatable (d), ring-shaped or disc-shaped bodies in the form of a circular spiral (17) with a constant pitch. The use of such simple and inexpensive spiral support body has the advantage that a linear, direct, precise adjustment behavior of the gap dimension is made possible.

Description

The invention relates to a machining unit for rotary machining with the preamble features of claim 1 and a label printing machine with such a machining unit according to claim 7.

State of the art

For label printing machines, such as those in the EP 2 103 429 B1 are described printing units and stamping plants are used. The printing units comprise at least three cylinders, namely inking roller, printing cylinder and impression cylinder. The rotary processing causes this application of paint on a substrate. The stamping plants comprise at least two cylinders, namely punching cylinders and punching counter-cylinders. The rotary processing causes this an introduction of punching and / or creasing lines. To adapt to the substrate to be processed and to set the punching depth of the gap, ie the distance between the cylinders must be adjustable.

For this purpose, supporting bodies are used, which can be designed as races, support rings and as so-called bearer rings. Examples of adjusting devices can be found in the DE 10 2005 015 046 A1 and the WO 2012/016758 A1 ,

A disadvantage of such adjustment is on the one hand their complicated and complex structure. On the other hand, the setting accuracy leaves something to be desired. This also results in a poor repeatability. That should be chosen for a repeat job exactly the same gap as in its last execution, so designed such an exact setting difficult.

task

Object of the present invention is therefore to provide a processing plant and a label printing machine with such a processing plant, in which the gap between the processing cylinders of the processing plant is simple, accurate and repeatable adjustable.

This object is achieved by a machining unit having the features of claim 1. The machining unit according to the invention for rotatively machining a web-shaped or arcuate substrate with at least two rotatable machining cylinders and a machine frame has a first cylinder, which is movably, in particular displaceably, mounted in the machine frame and a second, with the first cooperating cylinder, which is stationarily mounted in the machine frame. Each cylinder is associated with supporting body, wherein in particular a pair of arranged on the axis of rotation support body is provided, wherein the support body cooperate to support the cylinder against each other. Advantageously, the support body of the second cylinder are formed as a spiral support body as a rotatable, annular or disk-shaped body in the form of a circular spiral with a constant pitch. That is, the spiral support bodies have the form of a so-called arithmetic or Archimedean spiral. The slope of the spiral is to be selected depending on the path to be adjusted and the desired adjustment resolution. The use of such spiral support body has the advantage that a linear, precise adjustment behavior of the gap dimension is made possible. The spiral support bodies have a simple and inexpensive construction. The inventive assignment of the spiral support to the second cylinder an advantageous power flow is achieved, which allows the absorption of high forces.

According to the invention, the processing plant has a third cylinder, wherein each of the first and second and first and third cylinders tangent, ie in operative contact with each other. This third cylinder are also assigned spiral support body, which have the same structure as the spiral support of the second cylinder. While a processing plant with two processing cylinders, for example, can be used as a stamping or stamping mill, a processing plant with three processing cylinders can be used as a printing unit.

In the embodiment of the processing unit according to the invention, the third processing cylinder is stationarily mounted in the machine frame and the first processing cylinder is displaceably mounted along a linear guide and pivotable about a pivot point in the machine frame. This results in a stable two-point system of the printing cylinder, which allows the use of first processing cylinders of different diameters.

In a particularly advantageous and therefore preferred embodiment of the processing unit according to the invention, a respective spiral support body is formed part-circular, i. the spiral support is formed only by a sub-segment of a circular spiral, e.g. by a quarter circle, a semicircle or an intermediate circle. While a circular spiral support opens up a larger adjustment range for adjusting the gap between the cylinders, the adjustment range of a part-circularly shaped spiral support is limited, but sufficient for the specific requirements. By using the part-circular design thus material and space can be saved.

It is particularly advantageous if each cylinder with spiral support bodies is assigned an adjusting device for rotating the spiral support body relative to the axis of rotation of the respective machining cylinder, in the sense of an angular adjustment of the spiral support body. The adjusting device can be a device that can be actuated manually or by a motor. In the case of spiral support bodies assigned in pairs to a cylinder, in particular each spiral support body may be individually rotatable and adjustable for effecting an entanglement of the machining cylinders.

In a further development of the machining work, at least one actuating device is provided for turning on and off the machining cylinders and for applying a biasing force to at least one of the cylinders.

In one embodiment of the processing unit, the support bodies of the first processing cylinder are connected to the axis of rotation and rotatably mounted thereon executed ring-shaped or disc-shaped body, in particular as so-called support rings. These support bodies of the first cylinder act together with the spiral support bodies of the second and optionally the third cylinder and are in operative contact with these.

In a preferred embodiment of the processing unit, the first processing cylinder is designed as a printing cylinder, the second processing cylinder as a counter-pressure cylinder and the third cylinder as an inking roller, in particular as an anilox roller. The processing unit thus forms a printing unit, for example a flexographic printing unit, which serves to print on web-shaped or sheet-shaped substrates.

The invention also provides a label printing machine with at least one processing unit as described above.

The invention described and the described advantageous developments of the invention are also in combination with each other - as far as is technically feasible - advantageous developments of the invention.

With regard to further advantages and constructive and functional advantageous embodiments of the invention, reference is made to the dependent claims and the description of exemplary embodiments with reference to the accompanying figures.

embodiment

The invention will be explained in more detail with reference to attached figures. Corresponding elements and components are provided in the figures with the same reference numerals. In favor of a better clarity of the figures was waived a true to scale representation.

Fig. 1 a und b

ein erfindungsgemäßes Bearbeitungswerk mit drei Bearbeitungszylindern in zwei alternativen Ausführungsformen

Fig. 2

einen spiralförmigen Stützkörper

Fig. 3 a und b

zwei weitere Alternativen eines erfindungsgemäßen Bearbeitungswerks mit drei Bearbeitungszylindern

Fig. 4 a und b

eine weitere Alternative eines erfindungsgemäßen Bearbeitungswerks mit drei Bearbeitungszylindern in einer Ansicht und einer Schnittdarstellung

Fig. 5 a und b

ein Bearbeitungswerk mit zwei Bearbeitungszylindern in zwei alternativen Ausführungsformen

Fig. 6

eine erfindungsgemäße Etikettendruckmaschine

It show in a schematic representation

Fig. 1 a and b

an inventive processing plant with three processing cylinders in two alternative embodiments

Fig. 2

a helical support body

Fig. 3 a and b

two further alternatives of a processing unit according to the invention with three processing cylinders

Fig. 4 a and b

a further alternative of a processing unit according to the invention with three processing cylinders in a view and a sectional view

Fig. 5 a and b

a processing plant with two processing cylinders in two alternative embodiments

Fig. 6

a label printing machine according to the invention

In the FIGS. 1a . 1b . 3a . 3b and 4a are machining units 10 with three processing cylinders 11, 12, 13 shown in alternative embodiments. In the FIGS. 5a and 5b Machining works 10 are shown with two processing cylinders 11, 12 in alternative embodiments. Common to all embodiments is the use of spiral support members 14.

The cylinders 11, 12, 13 are preferably rotatably mounted on the respective axes of rotation 16 by means of rolling bearings (not shown). The support members 14, 15 are supported by these axles 16.

FIG. 1a shows a first embodiment of a processing unit 10 according to the invention with three processing cylinders 11, 12, 13. This may be, for example, a printing unit 110, as in FIG. 6 is shown. The second processing cylinder 12 and the third processing cylinder 13 each spiral support 14 are assigned. The first processing cylinder 11 are also Assigned supporting body 15, which may for example be designed as support rings, but in FIG. 1a are not shown. The spiral support 14 act together with the supporting bodies 15, not shown, of the first cylinder 11. The interaction of the support body 14, 15 results from FIG. 1b in which the contact points 22 are respectively designated between the spiral support body 14 and the support body 15 of the first cylinder. Analogous to in FIG. 4b illustrated embodiment, according to which the spiral support body 14 and the support body 15 are each arranged frontally to the cylinders 11, 12, 13 on the axes of rotation 16, the spiral support body 14 and the support body 15 in the embodiments according to the FIGS. 1a . 1b . 3a . 3b . 5a and 5b be arranged on the axes of rotation 16.

In the embodiment of FIG. 1a the first cylinder 11 is mounted in a pivotable about a pivot point 21 linear guide 20. The second cylinder 12 and the third cylinder 13 are stationarily mounted in the machine frame 9. If the gap between the cylinders 11, 12, 13, ie, the distance between the first cylinder 11 and the second cylinder 12 and between the first cylinder 11 and third cylinder 13 are changed, the disk-shaped spiral support 14 are rotated, which is a movement of the first cylinder 11 in its suspension 20, 21 causes. If the first cylinder 11 is to be replaced by a smaller cylinder 11 ', for example for adaptation of the format when the first cylinder 11 or 11' is the printing cylinder, then the first cylinder 11 'of smaller diameter assumes the in FIG. 1a and the gap between this first cylinder 11 'and the second cylinder 12 and the third cylinder 13 can also be adjusted by means of the spiral support body 14. In order to ensure safe installation of the first cylinder 11 or 11 'on the second cylinder 12 and third cylinder 13 on the two in FIG. 1b 22 to ensure contact points shown, a biasing force F is applied. For this purpose, a power-operated actuator 19 is provided for hiring and parking the cylinder and for generating a biasing force. In the embodiments according to FIG. 3a and 3b such an actuator 19 is indicated. In FIG. 3a is a manual adjusting device 18 for rotating the spiral support 14 indicated in FIG FIG. 3b a motorized adjustment device 18.

The mode of action of the distance setting and the configuration of the spiral support body 14 results from FIG. 2 The spiral support members 14 are annular or disk-shaped in the form of a circular spiral 17 with a constant pitch. In other words, the outer contour of the spiral support body 14, which represents the surface in contact with the support bodies 15 of the first cylinder 11, has the shape of a constant spiral circular spiral, that is, the shape of an Arithmetic or Archimedean spiral. How is it FIG. 2 results, the spiral support body 14 is formed only partial circular, ie, includes only a portion or a segment of the entire circular spiral 17, in the illustrated embodiment of about 125 °. By a rotational movement d of the spiral support body 14, which is realized by an adjusting device 18, the radius r between the rotation axis 16 and the contact point 22 is changed, as exemplified in FIG. 3a is drawn.

FIG. 1a shows an embodiment of the processing unit 10 with two stationary mounted in the machine frame 9 cylinders 12, 13 and a bearing means of linear guide 20 and pivot 21 in the machine frame 9 cylinder 11. In the embodiment according to FIG. 1b the cylinder 11 is supported only by means of a linear guide 20. In the embodiment of FIG. 3 a are the cylinders 11 and 13 mounted in a common bearing plate. Thus, the cylinders 11 and 13 can be moved relative to each other and together to the cylinder 12. The storage of the embodiment according to FIG. 3b is similar, wherein first cylinder 11 and third cylinder 13 are arranged in a horizontal and first cylinder 11 and second cylinder 12 with their axes 16 in a vertical. In the embodiment according to FIG. 4a If only the second cylinder 12 is stationarily mounted in the machine frame 9, the two cylinders 11 and 13 are movably mounted in the linear guide 20. The axes of rotation 16 of all cylinders 11, 12, 13 are arranged in a vertical.

A corresponding arrangement shows FIG. 5a for the use of only two cylinders 11, 12. A 90 ° rotated arrangement, according to which the axes 16 of the first cylinder 11 and the second cylinder 12 are arranged in a horizontal, is in FIG. 5b shown.

In the FIG. 6 Figure 11 is a view of a preferred embodiment of a printing machine 100, more specifically, a narrow web label printing machine in a series construction, with printing units 110 following in the horizontal direction. The label printing machine is used to process a substrate 1000 in web form. The substrate is unrolled from a substrate roll 146 in a feed section 148 of the printing press 142 and fed through a press machine 142 along a machine direction M path. The printing press 142 may comprise a plurality of frame modules 126, here by way of example three frame modules 126, which together form the machine frame 9. In this embodiment, two printing units 110 or a printing unit 110 and a processing unit 150, in this case a punching unit for punching out the labels on the web-shaped substrate 100, are received on a rack module 126. After the individual processing stations follows an outlet part 152, in which the finished products are wound up in a label roll 154. Feeding part 148, rack modules 126 and outlet part 152 are detachably connected to each other so that a modular structure of the printing press 142 results.

In the representation of the individual printing units 110, here flexographic printing units, in addition to the printing cylinders, the impression cylinders and the inking rollers and chamber doctor blade are shown. Furthermore, the printing units 110 in the printing press 100 have various drying devices: The counterpressure cylinders are assigned downstream of the respective printing gap of the printing unit 110 UV drying devices, so that the printed substrate 1000 can be dried directly on the impression cylinder. The printing units 110 also have web guiding rollers 160 for guiding the web-shaped substrate 1000. In the embodiment shown, the fifth printing unit 110 comprises a hot air drying device 162. Alternatively, a UV or an IR drying device could also be used here. Subsequently, a punching unit 150 is arranged, which has a punching cylinder and a counter-punching cylinder as rotating tools. In addition or as an alternative to the stamping plant, it is also possible to use a stamping mill, for example a hot foil stamping mill. As an alternative to the illustrated flexographic printing units, it is also possible to use gravure printing, offset printing units and rotary screen printing units.

At least one of the printing units 110 or the stamping unit 150 have the structure of the above-described processing plants 10.

LIST OF REFERENCE NUMBERS

9

machine frame

10

Cutting

11

first cylinder

11 '

first cylinder with a smaller diameter

12

second cylinder

13

third cylinder

14

Spiral support body

15

Supporting body of the 1st cylinder (support rings)

16

axis of rotation

17

circular spiral

18

adjustment

19

actuator

20

linear guide

21

pivot point

22

contact point

23

control device

100

press

110

printing unit

126

rack module

146

substrate roll

148

feeding

150

punching

152

exit station

154

label roll

160

web guide

162

Hot air dryer

1000

substratum

F

preload force

M

Machine direction

d

rotary motion

Claims (7)

Processing unit (10) for rotatively machining a web-shaped or arcuate substrate (1000) with at least two processing cylinders (11, 12) and a machine frame (9),
wherein a first processing cylinder (11) is movably mounted in the machine frame (9) and a second processing cylinder (12) is stationarily mounted in the machine frame (9), each machining cylinder (11, 12) being associated with supporting bodies (14, 15),
characterized,
that the supporting bodies (14) of the second working cylinder (12) as a spiral support body as the rotatable (d) ring- or disc-shaped body in form of a circular coil (17) are formed with a constant pitch,
in that the processing unit (10) has a third processing cylinder (13), which also has associated therewith spiral support bodies (14), and
in that the third processing cylinder (13) is mounted stationarily in the machine frame (9) and that the first processing cylinder (11) is mounted so as to be displaceable along a linear guide (20) and pivotable around a pivot point (21) in the machine frame (9). Machining plant according to one of the preceding claims,
characterized,
that a respective spiral support body (14) is formed part-circular. Machining plant according to one of the preceding claims,
characterized,
in that each machining cylinder (12, 13) with spiral support bodies (14) is associated with an adjusting device (18) for rotating the spiral support body (14) relative to the axis of rotation (16) of the respective machining cylinder (12, 13). Machining plant according to one of the preceding claims,
characterized,
in that at least one actuating device (19) is provided for engaging and disengaging at least one of the cylinders (11, 12, 13) and for applying a biasing force (F). Machining plant according to one of the preceding claims,
characterized,
in that the support bodies (15) of the first machining cylinder (11) are designed as annular or disc-shaped bodies connected to the axis of rotation (16) of the first machining cylinder (11). Machining plant according to one of the preceding claims,
characterized,
that the first working cylinder (11) as a printing cylinder, the second processing cylinder as a counter-pressure cylinder (12) and the third processing cylinder (13) are designed as a ink application roller. Label printing machine (100) with at least one processing unit (10) according to one of the preceding claims.

Images